[MEncoder-users] Does vf scale resample if input resolution is the same as desired output

[Grozdan Nikolov (openSUSE Linux)]

On Tuesday 12 February 2008 15:24, Nicolas Hesler wrote:
>  From the mplayer manual:
>
> scale:
>
> Scales the image with the software scaler (slow) and performs a
> YUV<−>RGB colorspace conversion (also see −sws).
>
> If you include vf scale in your command line for 720:480 and the source
> is already 720:480, does mencoder perform the scale

it uses a special unscaled converter, eg

[swscaler @ 0xf9f040]SwScaler: using unscaled yuv420p -> yuv420p special 
converter

> (colorspace 
> conversion, etc.) or does it see that the dimensions are the same and
> skip the scale.
>
> I'm performing batch jobs with mencoder and want to know if it's safe to
> leave the scale filter in the command line at all times.

yes it is safe :)

>
> Thanks,
>
> Nic
>
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-- 
Regards